svn commit: r355355 - in stable: 11/sys/dev/snp 12/sys/dev/snp

[Kyle Evans]

Author: kevans
Date: Tue Dec  3 19:14:02 2019
New Revision: 355355
URL: https://svnweb.freebsd.org/changeset/base/355355

Log:
  MFC r355205: snp: don't reference tp->t_mtx directly
  
  This is the only part of snp(4) that pokes around in struct tty directly;
  replace it with the tty_getlock accessor to avoid struct tty internals.

Modified:
  stable/12/sys/dev/snp/snp.c
Directory Properties:
  stable/12/   (props changed)

Changes in other areas also in this revision:
Modified:
  stable/11/sys/dev/snp/snp.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/12/sys/dev/snp/snp.c
==============================================================================
--- stable/12/sys/dev/snp/snp.c	Tue Dec  3 19:00:12 2019	(r355354)
+++ stable/12/sys/dev/snp/snp.c	Tue Dec  3 19:14:02 2019	(r355355)
@@ -178,7 +178,7 @@ snp_read(struct cdev *dev, struct uio *uio, int flag)
 			error = EWOULDBLOCK;
 			break;
 		}
-		error = cv_wait_sig(&ss->snp_outwait, tp->t_mtx);
+		error = cv_wait_sig(&ss->snp_outwait, tty_getlock(tp));
 		if (error != 0)
 			break;
 		if (tty_gone(tp)) {